Combustion

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-	== What is combustion ==	+	== What is combustion -- Physics versus modelling ==
		+
		+	Combustion phenomena consists of many physical and chemical processes with
		+	broad range of time scales. Mathematical description of combustion is not
		+	always trivial. Analytical solutions exists only for basic situations of
		+	laminar flame and
		+	because of its assumptions it is often restricted to few problems solved
		+	usually in zero or one-dimensional space.
		+
		+	Problems solved today concern mainly turbulent flows, gas as well as liquid
		+	fuels, pollution issues (products of combustion as well as for example noise
		+	pollution). These problems require not only extensive experimental
		+	work, but also numerical modelling. All combustion models must be validated
		+	against the experiments as each one has its own drawbacks and limits. However here
		+	the modelling part will be mainly addressed.
	== Physics versus modelling ==		== Physics versus modelling ==

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Revision as of 09:36, 18 September 2005

Contents 1 What is combustion -- Physics versus modelling 2 Physics versus modelling 3 Reaction mechanisms 4 Infinitely fast chemistry 4.1 Turbulent flame speed model 4.2 Eddy Break-Up model 4.3 Equilibrium chemistry models 5 Finite chemistry 5.1 Full reaction mechanism model 5.2 Reduced scheme models 6 References 7 External links and sources

What is combustion -- Physics versus modelling

Combustion phenomena consists of many physical and chemical processes with broad range of time scales. Mathematical description of combustion is not always trivial. Analytical solutions exists only for basic situations of laminar flame and because of its assumptions it is often restricted to few problems solved usually in zero or one-dimensional space.

Problems solved today concern mainly turbulent flows, gas as well as liquid fuels, pollution issues (products of combustion as well as for example noise pollution). These problems require not only extensive experimental work, but also numerical modelling. All combustion models must be validated against the experiments as each one has its own drawbacks and limits. However here the modelling part will be mainly addressed.

Physics versus modelling

Reaction mechanisms

Infinitely fast chemistry

Turbulent flame speed model

Eddy Break-Up model

Equilibrium chemistry models

Finite chemistry

Full reaction mechanism model

Reduced scheme models

1. Flamelet model

1. Other reaction progress variable models

References

External links and sources